Fig. 2. Difference between the solar longitudes of the minimal distance passge points and timings of the Earth passing the points of the same solar longitudes on its own orbit (axis X)
The red rhombus approximately restricts the area where the particles pass close enought to the Earth's orbit roughly in the same time with the Earth itself.
Fig. 3. Detailed space-temporal projection of June Bootids trails parts onto their minimal distance to the Earth orbit passages in 200